A prank originating in Maryland to be performed during sexual intercourse.

YOU NEED:
-A girl, preferably one who is willing to have sex with you.
-A friend
-A room with a closet and a window.

WHAT YOU DO:
Step 1: Make your friend hide in the closet.
Step 2: Convince the girl to have sex with you while looking out the window.
Step 3: During intercourse, the friend silently comes out from the closet and you switch with him. Unbeknownst to her, your friend is now having sex with the girl.
Step 4: Go outside, in view of the window, and wave at your girl.

-CAUTION-
It is quite likely that performing the California Border Hop will put your friend's penis will soon be in peril and his face may soon have a red hand mark imprinted on it.